Capacity unit



Aug. 24 ,1926. 1,597,291

J A. Rosamond CAPACITY UNIT ,Filed Feb. 24, 1925 4 sheets sheetfg 1 Aug. 24 1926.

J. A. ROSE-MONO cAncrry unu'r I Filed Feb. 24, 1925 4 Sheets-Shoot. 3

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Aug, 24, 1926. 1,597,291

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Patented Aug. 24, 1926.

Imus a someone: cm nsroN, so'um c'laema GAPACiTY' UNIT.

Application filed Fe'bruary24, 1925. Serial No. 11,248.

This invention relates to improvements in the construction of capacity units adapted for use with alternating currents. 7

An object of the invention resides in-providinga bank of plate units constructedfor controlling the voltage of an alternating telren "substantially on the line current from a constant source of supply, for use with an arc welding tool, so that the desired form of arc for'welding purposes may be obtained in connection with the tool and the work, beingwelded.

A further object of the invention is to provide a bank of independent units, which are constructed in the most simple and eX-- 'peditious manner, providing an adjustable or variable set of units for interconnection with an arc welding circuit to use alter nating currents from a constant source ,of supply for controlling the potential of the are current, in order to obtain the desired form of weld.

The invention further c'omprehends the provision of a special unit structure, wherein a air of bar members are provided with suita le insulatin sleeves upon which are removably assfemb ed in alignedrelation, a plurality ofplate' members adapted to be arranged in spaced parallel groups on said rod and insulated from one another, so that when connected in-the arc circuit for use with alternating currents, said plate will operate to effect a control of the potential of the arc current in proportion to the power applied from a constant source.

The invention comprehends further objects and advantages residing in the details of construction and arrangement of the parts which are more particularly pointed out in the following detailed description and in the claims directed to the preferred embodiment of the invention, it being understood, however, i that desired variations of the plate construction and methods vof mountingand connecting the units in circuitmay be made, within the'scope of this invention as described and claimed. e In the drawings, forming apart of this ppl cati .4 r. ,1 s 'el .i 'wtmn e vat enoi he bank i un smwnted in a ui ab surue ifl H and rovided with controlling witeh s here t; i lie-2 isa vertical sectional ,niew,

2-2'0fFigurel.

Figure 3 is a vertical sectional view, through one end portion of one of the plate units showing the manner of connecting the rod to a supporting bracket {or the unit and the manner of mounting and insulating h p e e on. A

Figure 4 is a detail perspective view, on an enlarged scale, of onegof the plates used in the construction of the upper control unit.

Figure 5 is a detail perspective view on an enlarged scale, of one of the late member's used inthe construction o the lower and intermediate units.

Figure 6 is a sectional view,

line 66 of Figure 3,

Figure 7 is a diagrammatic view, showing the several units constructed in accordance with this invention, connected injcirc it with the control switches, and showing t l e talren on the other wiring connection for illustrating the use of the invention in arcwelding, with alternating currents.

1 indicates a pair of main frame sections,v

whichare formed of angle iron',.int o'substantially rectangular form, as illustrated more clearly in' Figure 2. These sect-ions are mounted, in spaced 5 parallel relation through the medium of the connecting anglle bars2, which are disposed at the to an bottom of theiraine sections 1 ,an form a mounting or suitable support for the structural unit of theinvention.

Bars 3 aremounted in spaced relation, in each of the rectangular frame members, 1, and are adapted to form mountings for each of the intermediate and lower late units, while a supporting bracket n'em er l is mounted in the upper end of each, of the main frames 1, of substantially Y-sha perfor receivin and v mounting the upper plate unit. hese bars members ,3 and, the brackets 4 may be riveted to these lefraiiies or secured thereto, in any suitablemanner, o s p 1 w pl eun ea spaced relation with respect eachotlier andci p d r a io Wi h r sp a t e frame, so that peration? there be leakag of current from the plate unitlto porting bars 5 extend through openings in the brackets in the respective "frames 1 and between these frames are provided with insulating sleeves T, to form a protectivv covering for the supporting bar. A plurality of suitable metallic plates 8 are adapted for mounting on the bars 5 to form the unit, said plates having a substantially square configuration and being formed with bosses 9 at a pair of adjacent corners and intermediate the remaining pair of corners and adjacent the side edge of the plate memher, so that the bosses will lie at the apices of a triangle, in the plane of the plate 8. The plate 8 is formed with transverse open ings 10. extending through each of the be 9, and which are adapted to receive the sup porting bars 5, with the insulating sleeves T thereon, so that the plate members 8 are in sulated from the bar members 5, to prevent the flow of electricity thereto. These plates 8 are arranged in groups having electrical connection through contacts between th ends of the bosses 9, as clearly illustrated in Figure 3, while each independent group of electrically connected plates 8 are insulated from one another by the use of insulating rings 11, mounted over the sleeve 7 and disposed between the bosses t) of ad jacent plates of a pair of adjoining groups. so that each group is insulated from each adjacent group. At the ends of each unit are a plurality of thrust rings 12, one of which is constructed of insulating material as indicated by numeral 12, while a thrust sleeve 13 is disposed over the sleeve 7, so that the application of the nut 6 to the ba 5 will compress the bracket l and all 0 the plates and rings mounted on the bar 0 and insulating sleeve 7 toward each other and lock the same in rigid assembled unit forming relation. The insulated thrust ring 2 prevents electrical connection between the sleeve 13 and the end group of plates 8. so that all of the groups of plates 't'orm independent conducting members for the electricity which are insulated from the sup porting elements.

In the upper plate unit, a relatively few plates are arranged in grouas and it has been found desirable, in this connection. to so arrange the groups that the current flow is caused to take a zig-zag course across the plate of the unit and for this purpose contact rings 14 are used in conjunction with insulating rings 11, between adjacent plates of a unit in alternate relation, as illustrated in Figure 7, so that the current is caused to take a circuitous path through the several plates of each unit. The advantage of this construction will be presently pointed out.

The roller plate unit 15 and the inter- .mediate plate unit 16 are constructed in a similar manner to'the upper plate unit, and as illustrated more particularly in Figure 2 comprise a pair of spaced parallel supporting rods 17 for each unit, which are adapted to extend through the openings 18 formed in opposite sides of the plate 19, which are provided with bosses 20, surrounding said openings, so as to mount the adjacent plates oil a group in spaced relation, while the ends of the bosses serve to provide for electrical contacts between these plates. The plates are assembled with the bar members 3. in the same manner as above described for the assemblage of the plates of the upper units. Insulating sleeves are mounted on the rods 17, and insulating rings are used for insulating the several groups of plates in the same manner as the groups of the upper unit. and it is not believed that further description is necessary.

In each of the units it may be found desirabl. to use a terminal. bar, as illustrated at 21. in Figure '7, so that a removable clip connection may be detachably secured t reto, for using predetermined units and groups of a unit, in the arc circuit of the welding device.

A control switch 23 of the double-pole double-throw type is mounted on a suitable insulating base 24c, carried by one of the frames 1, as illustrated in Figure 1 of the drawings which provides a means of controlling the connection of the device with a source of power through the wire for the operation of the welding circuit. One side of the line is connected through one pole of the switch to a ground connection 26. The other pole of the switch serves to control the current from the source on the other side of the circuit and is connected by a wire 27 to the detachable contactmember 2 which is adapted for detachable connection with any one of the terminals 21 of the plate unit, so that a predetern'iined number oi groups of plates of either or all of the units may be connected in the arc welding circuit. The intermediate and lower groups 01' plate units are electrically connected by a conductor 28, at one end. which establishes electrical connection between end groups of plate units at one end of each of the inter mediate and lower units. The groups of plates of the lower units, at the end opposite the group having the conductor connection 28 is provided with a circuit connection 29, with one group of plates of the upper unit at one end of said unit. The terminals 21 of each group of upper units, are provided with independent conductor connections 30, with a plurality of independent stationary contacts 31. mounted on a suitable base 32. carried by the frames 1. in a manner as illustrated in Figure 1 of the drawings. These contacts 31 are arranged in circumferential relation for engagement by the knife blade switch member 33, which is mounted for pivotal movement on the cen-- tral contact 34, which is electrically connected by a conductor cable 35, with a suitable form of weldin tool 36.

The work which 18 to be welded is indicated at 37, which is provided with a ground connection 38.

In the use of this invention for are welding, the usual source of current supply afforded by most cities or power plants, which is usually alternating current having a potential of 110 volts and is single phase with a frequency of about 60 cycles, is especially adapted for this invention.

When the double-pole, double-throw switch 23 is closed, for connecting the arc Welding device in circuit with the source of power, so that when the switch 33 is thrown into engagement with one of the contacts 31, the welding tool 36 is closed, so that upon bringing the end of the tool'into proximity with the work at the point of welding, an arc of the desired voltage for welding purposes will be obtained between the work and the tool throu h the capacitative discharge from the p ate unit, in accordance with the number of groups of plates connected in the circuit under the action of the alternating current from the source. The character and voltage of the welding arc may be varied, by changing the position of the switch blade 33 for cutting in or out of circuit groups of plates of the upper plate unit, while the detachable member 22 may be connected to any one of the terminals 21, for additionally controlling the welding arc, through varying the capacitative reaction of the unit.

It will thus be seen that a simple and eflicient device embodying a particular plate construction unit has been provided by the present invention, which is adapted to effect the control of alternating currents through the use of capacities for obtaining the desired voltage of welding arc, with the use of a constant source of alternating current power.

What is claimed is:

1. A capacity unit comprising spaced parallel supporting bars having the surfaces thereof provided with an insulating covering, plate members mounted on said bars in spaced relation, insulating members mounted on said bars between predetermined plate members for insulating predetermined groups of said plate members from one another, and means mounted on the supporting bars for retaining said plate members in assembled relation and unit forming relation.

2. A capacity unit comprising spaced parallel supporting bars having the surfaces thereof provided with an insulatin covering, plate members mounted on said bars in spaced relation, insulating members mounted on said bars between predetermined plate members for insulating predetermined groups of said plate members from one another, means mounted on the supporting bars for retaining said plate members in assembled and unit forming relation, and terminal elements mounted on predetermined groups of said supporting bars for electrical connection with predetermined groups of said plates, said terminal elements being adapted to receive a removable connection for varying the groups of plate members of the unit within an electric circuit.

3. A capacity unit comprising an open supporting frame having a pair of interconnected rectangular frame members, unit supporting means carried by said rectangular frame members in spaced relation, and a plurality of plate units mounted in said frame work between said rectangular frames and carried by the unit supporting members, said plate units comprising parallel supporting bars provided with insulating covering extending through said supporting plate in the frame work, a plurality of frame members having openings therein receiving said supporting bars on which said plates are mounted in spaced relation, insulating means between predetermined groups of plates of each unit, and means mounted on the ends of the supporting bars for retaining said bars and plate members in assembled relation, and for mounting said units in fixed relation in said supporting frame.

n testimony whereof I aflix my signature.

JAMES A. ROSEMOND. 

